Quinoa is a great grain. It's full of fiber and protein and is as versatile as rice. Check it out at your healthfood store.
Olive oil, avacado, almonds, walnuts, fish - all healty sources of fat.
But yeah like Kevin said... eat a lot. Make good choices though, the SAD diet (or standard north american diet) is full of refined sugar, salt, and low in nutrients and fiber. 30-40 years from now, those things are gonna catch up with you. The SAD diet is associated with most chronic diseases: cancer, heart disease, strokes... etc. I don't mean to be a little black rain cloud, but we live in a toxic world, we eat toxic food and often think toxic thoughts. Health is a choice. We can choose to think good thoughts, eat good food, and surround ourselves by positivity.